Type-writing machine.



J. G. MGLAUGHLIN; TYPE WRITING MACHINE. APPLICATION FILED JAN. 14, 1908. Qfg i; atented Ap?, 5, i910.

3 SHEETS-SHEET 2,

C, MGLAGHLIN. TYPE 'WRITING MHINB. 1 PLIGATION FILED JAN. 14, 100e.

3 SHEETS-SHEET 3.

VWSZS.

Fatented Apt-5,1910.

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. arias-warmste minorities.

To allvwhom tit may concern.:

. Be it known that I, JOHN C. MOLAUGHLIN,

.a citizen of the United States, residing rin Jersey City, in the county of Hudson and State o New Jersey, have invented certain new and usetul Improvements in TypeJWriting Machines, of which the following` is a specilication.

rl`his invention relaties to typewriting and tabulating machines, and particularly to means for braking or controlling the speed of the carriage when the .same is released from its letter spacing mechanism. V

` ln' a. c-pending application No. 403,891, tiled November 26, 1907, is illustrated one forni ot revolving brake which is operated l by a pinion, the latter being caused by the carriage-release key to mesh with a gear provided upoithe spring barrel which propels the carriage.

l@ne of the objects ot the"present invenf tion is to prevent any ill results when a. -tip oit the tooth of the .pinion accidentally catches upon the tip of the toot'hot' the gear. For this purpose, I provide a yielding connection. betweei'iv thebrake trame or barrel and said release key7 so that. the depression of the release key may be completed in any case. Said yielding connection is preferably in the form of a spring, which acts iininediately upon t-he release of the carriage to force the pinion into proper mesh with the .gear on the carriagespring barrel.

Another object of the invention is to provide a suitable attachment for employing the aforesaid braking means in connection with the simple tabulating'mechanism heretofore generally employed upon Underwood typewriting machines.

*1n the accompanying drawingaFigure 1 is a sectional side elevation of a portion of an Underwood typewriting machine'having my improvements applied thereto; the parts being shown in normal positions. Fig. 2 is a fragmentary view of certain parts seen. at Fig. 1. Fig. 3 is a View similar to Fig. 1, but showing the tabulating key depressed.

l.F ig. 4 is a 'rear view of the machine illustrating many of the parts seen at Fig. 1. Fig. 5 is a diagram to illustrate the action of the aforesaid yielding connection when the tips of the teeth of the pinion ride uponthe tips of the teeth of the gear wheel. ig. 6 is a plan view to illustrate the operation seen at Fig. 5. Fig. 7 is a planof the prinl 'y j Specification of Letters Patent. ,Application filed. January-14, 1908. Serial No. 410,738.

brake barrel, showing thepfrr rATnNT-oiirion Joni@ c. ivreraiicinrn, or JERsEr Grrr, NEW transav, Assiononm .UN. EBW

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fatented i Q cipal parts of the carriage; elez anisin. Fig. S shows a sectiot positions. Fgj is apar siinilar'to Fig. (3. l "ig..lff i to F ig. but Slimvin'gthepar positions. Fig. l1 isa 1view 'fo -rthen which forms a yielding connectionlt' brake barrel, and which is shown in mal positions at Figs. 5 and G;` 65

The usual single tabulatingikeyfioff.- `Underwood typewritii'ig` finaohine-is indit cated at 1A upon the forwards end-@oli .ai-rey. lever Q, which is connectedibyfa liiikf to inf arni a projecting forwardly:idron'iT rock` shaft 5, journaled upon thev inachineftranie G and connected by endfbars7fto` a cylin-c drical rod S and a bar 9. Column-stops-10.` are adjustable along said cylindrical bar-.8: to engage successively av stopv v11,provided abrio lupon a'carriage 12, which is connected. bya

Q0 to lift the rack 15 and release it from the pinion 17, so that the carriage ymay run along until arrested by engagement of stop 11 with the stop'lO. To prevent too rapid movement of the carriage, I provide a sec'- ond arm 21 upon the rock shaft- 5, and depend therefrom a link 22, whose-lower end is pivoted to an arm extending forwardly from a rock shaft 24, thelatter carrying a frame or barrel 25 containing a revolving brake mechanism. The brake is operated by a pinion 2G, which at the depression of the key 1 is swung 'forwardly 100 from thevFig. 1 position into mesh with a gear 27 provided upon the spring barrel .14, Figs. '3 `and so that during the revolution of the spring barrelthe brake is caused to opera te, and hencgx :the speed of the carriage 105 is regulated. In order to avoid slipping or other trouble that might ensue when the tips of the teeth of the pinion ride upon the tips of the teeth of the gear, Fig. 5, provide a yieidirfgveonneclionbetween the HO,

y'as seen c early at Fig. 5. mally under tension and suiiiciently strong to hold the barrel 25 in its proper relation brake barrel 25 and the rock shaft 24 on which it is mounted. This connectioncomprises a leaf-spring or yielding finger 28 secured by a screw 29 uponja hub 30* of the barrel 25; At its other end, the spring is bent inwardly at a right angle to a finger 31. The hub 30 is recessed at 32 to admit the finger, and the rock shaft 24 is formed with a cutaway 33 which is engaged by the ,springlfingerl 31,' whereby displacement of the brake barrel 25l along the shaft 24 is prevented. The cutaway 33 extends about half way through the rock shaftfan'd the finger-3l hasoppositiips 34 to engage with the flat surface 35 which forms the bottom of recess33, lso that there can be no relative turningvbetweenthe rock shaft and the hub 30 vwithout forcing the spring 28 outwardly, Figs. 5,6, by the action of the fiat 35 u on one of the tips 34 of the spring, The spring is norcross arm 37,' from which depend pivoted weights 38,v each having an arm press up against a plate 40 when the weights 38 swing out byvreason of centrifugal force. The plate 4Q presses a friction washer 41 against the top or cap 42 of the barrel, thereby retarding the movement of the -pin- 2 ion 26, gear f27 and spring barrel 14, and

hence of the paper carriage l2. Having thus described my invention, I claimg'" v 1. Indagtypewriting' machine, the combination with a power-driven carriage and an -escapeinent mechanism therefor, of a key having means to release the carriage, af rock shaft ,operated by said lkey, a revolving brake carried by said rockshaft and having a pinion swung'by said rock shaft into engagement 'with a rack connected to the carriage, and a spring secured upon a hub of a barrel that -carries the brake, the rock shaft being cnt away to ,formf a cam, and the spring having a clip to engage the cam and maintain the barrel yieldingly against rotation independent. of the rock shaft.

2.111 a typewriting machine, the combination with a-power-driven carriage and an escapementmechanism therefor, of a key having means 'tof-release the carriage, a rock shaft operated by said key, a revolving brake carried by said rock shaft and having a pinion swung by said rock shaft into engagernent with a rack connected to the car- A riage, and a spring secured upon a hub of a barrel that carries` the brake, the rock shaft' being cut away to form a cam, and the spring having a clip toengagethe'cam'and maintain the barrel yieldingly adainstvrotation independent of the rock shaft; said clip iitting inthe cutaway in the rock shaft and preventing longitudinal v movement of the barrel upon the rock shaft.

JOHN c, MCLAUGHLIN.

lVitnesses: y Y

JOHN O. SEIFERT, K. FRAXKFORT. 

